The USAC Road Racing Championship was a sports car racing series in the United States held from 1958 until 1962. The series was organized by the United States Auto Club as a fully professional alternative to the Sports Car Club of America's SCCA National Sports Car Championship. Champions External links World Sports Racing Prototypes: USAC Road Racing Championship archive Racing Sports Cars: USAC Road Racing Championship archive Usac Road Racing Championship Usac Road Racing Championship